290 TKOCKEDINGS OF THE MALACOLOGICVL SOCIETY. 



The kidney is very large — 15 mm. long — about half the length 

 of the whole pallial cavity, and four times that of the pericartUum. 

 The usual retrograde ureter is developed. The secondary or gut 

 ureter is wholly open, merely a thickened band of tissue along the 

 terminal course of the gut, upon which there is a low ridge, which 

 in the natural position of the organs defines a gutter. A transverse 

 section of the gut with this gutter spread open is shown to the 

 left of Fig. 5. 



So far as I know, the pallial organs of Thersites have not before 

 been examined. Their structure confirms the very close relationship 

 to ChJoritis already predicated from the similar genitalia. 



The penis (PI. Xltl, Fig. 4) is swollen distully, continued in 

 an epiphallus of about the same length, which terminates in a short 

 flagellum. The vagina is long, more than half the length of the 

 penis. The duct of the spermatheca is long, as usual in the genus. 



Chloritis fragilis, Gude. 



A specimen, not quite mature, of this species, sent by 

 Mr. Hii'ase from Kyoto, Japan, was dissected to ascertain whether the 

 far northern species I'eally belong to the typically tropical genus 

 Chloritis. This inquiry may now be answered affirmatively. No 

 Japanese species of the genus has been examined anatomically 

 heretofore. 



The tail has a wide rounded welt above, but no longitudinal median 

 groove there, such as occurs in C. Porteri. 



The lung (PI. XIV, Fig. 14) is rather short. The pulmonary vein 

 bears a large branch on the cardiac side, which is more copiously 

 supplied with veins than usual. The intestinal side is closely parallf 1- 

 veined. The pericardium is one-fourth as long as the kidney. The 

 kidney is very long, band-like, and reflexed in a long primary ureter 

 as usual. The secondary or gut ureter is a noi-row, open band. 



The long kidney is a characteristic feature of the Epiphallogona or 

 Camfeninje. 



The genitalia of the specimen examined (PI. XIY, Fig. 16) show 

 immaturity. The penis is much swollen distally, containing a large 

 papilla. The well-developed epiphallus terminates in a very short 

 flagellum, and bears the penial retractor muscle near its base. There 

 is a rather long vagina and a long duct of the spermatheca. It will 

 be seen that these organs agree well with Chloritis except in the 

 shortness of the flagellum, which is a characteristic of the subgenus 

 Trichochloritis, Pils., to which group all species found north of the 

 equator are probably referable. 



The jaw (PI. XIV, Fig. 17) has 10 ribs, strongly projecting on the 

 basal margin. 



The central tooth has small ectocones. The laterals (PI. XIV, 

 Fig. 18) have also ectocones, and the marginal teeth (PI. XIV, Fig. 19) 

 are of the ordinary tricuspid type. The teeth are throughout very 

 similar to those of Chloritis argi'llacea, as figui'ed by Wiegmann. 



